/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package cn.zch.test.netty.udt.echo.bytes;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.udt.nio.NioUdtProvider;
/**
 * Handler implementation for the echo client. It initiates the ping-pong
 * traffic between the echo client and server by sending the first message to
 * the server on activation.
 */
public class ByteEchoClientHandler extends SimpleChannelInboundHandler<ByteBuf> {
  private final ByteBuf message;
  public ByteEchoClientHandler() {
    super(false);
    message = Unpooled.buffer(ByteEchoClient.SIZE);
    for (int i = 0; i < message.capacity(); i++) {
      message.writeByte((byte) i);
    }
  }
  @Override
  public void channelActive(final ChannelHandlerContext ctx) {
    System.err.println("ECHO active " + NioUdtProvider.socketUDT(ctx.channel()).toStringOptions());
    ctx.writeAndFlush(message);
  }
  @Override
  public void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) {
    ctx.write(msg);
  }
  @Override
  public void channelReadComplete(ChannelHandlerContext ctx) {
    ctx.flush();
  }
  @Override
  public void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause) {
    cause.printStackTrace();
    ctx.close();
  }
}
